US5023908A - Method and apparatus for personal identification - Google Patents
Method and apparatus for personal identification Download PDFInfo
- Publication number
- US5023908A US5023908A US07/341,932 US34193289A US5023908A US 5023908 A US5023908 A US 5023908A US 34193289 A US34193289 A US 34193289A US 5023908 A US5023908 A US 5023908A
- Authority
- US
- United States
- Prior art keywords
- pin
- code
- nonpredictable
- individual
- nonpredictable code
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07F—COIN-FREED OR LIKE APPARATUS
- G07F7/00—Mechanisms actuated by objects other than coins to free or to actuate vending, hiring, coin or paper currency dispensing or refunding apparatus
- G07F7/08—Mechanisms actuated by objects other than coins to free or to actuate vending, hiring, coin or paper currency dispensing or refunding apparatus by coded identity card or credit card or other personal identification means
- G07F7/10—Mechanisms actuated by objects other than coins to free or to actuate vending, hiring, coin or paper currency dispensing or refunding apparatus by coded identity card or credit card or other personal identification means together with a coded signal, e.g. in the form of personal identification information, like personal identification number [PIN] or biometric data
- G07F7/1016—Devices or methods for securing the PIN and other transaction-data, e.g. by encryption
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/30—Authentication, i.e. establishing the identity or authorisation of security principals
- G06F21/31—User authentication
- G06F21/34—User authentication involving the use of external additional devices, e.g. dongles or smart cards
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/70—Protecting specific internal or peripheral components, in which the protection of a component leads to protection of the entire computer
- G06F21/71—Protecting specific internal or peripheral components, in which the protection of a component leads to protection of the entire computer to assure secure computing or processing of information
- G06F21/72—Protecting specific internal or peripheral components, in which the protection of a component leads to protection of the entire computer to assure secure computing or processing of information in cryptographic circuits
- G06F21/725—Protecting specific internal or peripheral components, in which the protection of a component leads to protection of the entire computer to assure secure computing or processing of information in cryptographic circuits operating on a secure reference time value
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F7/00—Methods or arrangements for processing data by operating upon the order or content of the data handled
- G06F7/58—Random or pseudo-random number generators
- G06F7/582—Pseudo-random number generators
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q20/00—Payment architectures, schemes or protocols
- G06Q20/30—Payment architectures, schemes or protocols characterised by the use of specific devices or networks
- G06Q20/34—Payment architectures, schemes or protocols characterised by the use of specific devices or networks using cards, e.g. integrated circuit [IC] cards or magnetic cards
- G06Q20/346—Cards serving only as information carrier of service
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q20/00—Payment architectures, schemes or protocols
- G06Q20/38—Payment protocols; Details thereof
- G06Q20/385—Payment protocols; Details thereof using an alias or single-use codes
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q20/00—Payment architectures, schemes or protocols
- G06Q20/38—Payment protocols; Details thereof
- G06Q20/40—Authorisation, e.g. identification of payer or payee, verification of customer or shop credentials; Review and approval of payers, e.g. check credit lines or negative lists
- G06Q20/401—Transaction verification
- G06Q20/4012—Verifying personal identification numbers [PIN]
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C9/00—Individual registration on entry or exit
- G07C9/20—Individual registration on entry or exit involving the use of a pass
- G07C9/215—Individual registration on entry or exit involving the use of a pass the system having a variable access-code, e.g. varied as a function of time
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07F—COIN-FREED OR LIKE APPARATUS
- G07F7/00—Mechanisms actuated by objects other than coins to free or to actuate vending, hiring, coin or paper currency dispensing or refunding apparatus
- G07F7/08—Mechanisms actuated by objects other than coins to free or to actuate vending, hiring, coin or paper currency dispensing or refunding apparatus by coded identity card or credit card or other personal identification means
- G07F7/10—Mechanisms actuated by objects other than coins to free or to actuate vending, hiring, coin or paper currency dispensing or refunding apparatus by coded identity card or credit card or other personal identification means together with a coded signal, e.g. in the form of personal identification information, like personal identification number [PIN] or biometric data
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07F—COIN-FREED OR LIKE APPARATUS
- G07F7/00—Mechanisms actuated by objects other than coins to free or to actuate vending, hiring, coin or paper currency dispensing or refunding apparatus
- G07F7/08—Mechanisms actuated by objects other than coins to free or to actuate vending, hiring, coin or paper currency dispensing or refunding apparatus by coded identity card or credit card or other personal identification means
- G07F7/10—Mechanisms actuated by objects other than coins to free or to actuate vending, hiring, coin or paper currency dispensing or refunding apparatus by coded identity card or credit card or other personal identification means together with a coded signal, e.g. in the form of personal identification information, like personal identification number [PIN] or biometric data
- G07F7/1008—Active credit-cards provided with means to personalise their use, e.g. with PIN-introduction/comparison system
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S379/00—Telephonic communications
- Y10S379/903—Password
Definitions
- This invention relates to methods and apparatus for identifying an individual and more particularly to methods and apparatus for providing improved security for a personal identification number (PIN) utilized in conjunction with such an identification system.
- PIN personal identification number
- Personal identification systems may be based on something someone has, such as a card or badge, something that someone knows, such as a PIN, or some characteristic of the individual, such as his fingerprints or speech pattern. Security for such systems is enhanced by utilizing two or more of the above in performing the identification.
- parent U.S. Pat. No. 4,720,860 discloses a personal identification system wherein the individual has a card or other small, portable device which contains a microprocessor programmed to utilize a secret algorithm to generate a nonpredictable number from a stored value unique to the individual and a time varying value provided for example by a clock.
- the nonpredictable value is preferably displayed on the device.
- the individual then enters his secret PIN into a central verification system, either directly or over a telephone line, causing the central system to access stored information corresponding to the individual and to utilize at least some of this information to generate a nonpredictable value at the central computer utilizing the same algorithm as at the individual's microprocessor.
- the individual is entering the number appearing at that period of time on the display of his device.
- the two values will match, signifying identification of the individual, only if the individual has entered the correct PIN and if the individual has the proper device so that the nonpredictable code displayed corresponds to that being generated at the central verification computer.
- the PIN may either be stored in the user's device, or may be entered by the user. If the PIN is stored in the device, it is read from the device by a suitable reader and causes the central verification computer to generate a unique challenge code to the individual. This challenge code may either be entered by the individual into his machine, or may be automatically sensed by the machine, and is operated on by the user's device to generate a unique nonpredictable code which is then entered into the central computer to effect verification.
- One potential difficulty with either of the systems indicated above is that an unauthorized individual may be able to obtain access to the user's PIN by electronic eavesdropping, reducing the security provided by the system. If, for example, the PIN is transmitted over public lines, such as telephone lines, from the user to the central verification computer, it may be possible to tap these lines and intercept the PIN as it is being transmitted. If the PIN is stored in the device, someone obtaining the device surreptitiously may, through sophisticated means, be able to determine the PIN stored in the device and thus defeat the security of the system. Furthermore, any storing of a PIN or password in the portable device for comparison defeats the purpose of an independent identification factor and reduces security to a "thing" possessed.
- this invention provides a method for personal identification and apparatus for the practice thereof wherein a device in the possession of the individual is utilized to generate a unique, time varying, nonpredictable code; the nonpredictable code generated at a given time is mixed with a secret PIN for the individual; the mixed output is communicated to a central verification computer; and the verification computer strips the PIN from the communicated value and utilizes the stripped PIN and remaining nonpredictable code o perform a verification operation.
- a nonsecret identifying code for the individual is communicated to the verification computer; the verification computer utilizes the nonsecret identifying code to obtain the PIN and appropriate nonpredictable code for the individual; and the verification operation includes the PIN and appropriate nonpredictable code obtained during the obtaining step being compared with the stripped PIN and remaining nonpredictable code.
- the verification computer may also generate a unique challenge value in response to the nonsecret identifying code which challenge code is communicated to the device in possession of the individual.
- the challenge code is communicated to the individual and the individual inputs the challenge value and the PIN to his device, the device includes means responsive to the challenge value for generating the nonpredictable code.
- the device may receive the PIN and the nonpredictable code and generate an output which is a predetermined function of the inputs.
- the predetermined function may, for example, be a sum of the inputs, for example the sum of the inputs without carry.
- FIG. 1 is a semi-block schematic diagram of the verification system of a first embodiment of the invention.
- FIG. 2 is a block schematic diagram of a second embodiment of the invention.
- FIG. 3 is a block flow diagram illustrating the operation of the first embodiment of the invention and alternative steps for the second embodiment of the invention.
- FIG. 1 shows illustrative structure for a personal identification system of a first embodiment of the invention.
- a user verification device 10 is provided which is of the type described in the parent applications.
- the device is preferably of the general size and shape of a standard credit card, although its thickness dimension may be slightly greater than that of such cards.
- the device 10 has a clock which generates a time-dependent digital output to a microprocessor which is programmed with a unique algorithm to operate on the time-dependent clock input and on a stored static value unique to a given user to generate a multi-bit nonpredictable code.
- a plurality of input areas 12 are provided on the face of device 10. These areas are preferably each indicative of a numerical digit, for example the digits 1-0 as shown in FIG.
- Area 14 may be a liquid crystal display or other suitable display device for producing numeric or alpha-numeric characters. Each area of display 14 is adapted to display a different digit of the nonpredictable code.
- the user initially transmits a nonsecret identifying code to verification computer 16 by keying this number into a telephone 18 at his location. This number is transmitted over telephone lines 20 to telephone 22 at the verification station and through a modem 24 at this station to the verification computer. The user may then use the telephone 18 to key in and transmit the nonpredictable code being displayed at that time on display 14.
- FIG. 3 is a flow diagram illustrating in greater detail the operation of the system of FIG. 1 to perform a verification operation.
- step 30 is for the user to send his nonsecret code to verification computer (VC) 16.
- VC verification computer
- this is accomplished by the user keying his nonsecret identification number into telephone 18 for transmission through telephone line 20, telephone 22 and modem 24 to the verification computer.
- the verification computer retrieves the user's PIN and generates the nonpredictable code for the user, using the same algorithm and stored static value as user device 10, and using a time-related value from a clock device at the verification computer, which is maintained in synchronism with the clock at the user device in a manner discussed in the parent application (step 32).
- the verification computer retrieves the PIN and nonpredictable code for the user, the user is inputting his PIN into his device 10 using key pads or areas 12 (step 34). While the user is inputting his pin, the user device is continuously generating nonpredictable code values at its internal processor in response to the clock value and the stored static value using the unique algorithm at the user device processor (step 36).
- step 38 is for the generated nonpredictable code and the inputted pin to be mixed by the processor in device 10 to generate a new nonpredictable code which is displayed on display 14.
- the mixing operation may be a simple addition of the two values without carry, or with carry, (a constant added to a pseudo random number produces a pseudo random number) or may involve a more sophisticated mixing algorithm.
- step 40 the user transmits the displayed value by use of telephone 18 through telephone line 20, telephone 22, and modem 24 to verification computer 16.
- step 42 the verification computer uses the PIN for the user which was retrieved during step 32 to strip the PIN from the inputted nonpredictable code, the result being a PIN value and a nonpredictable code value.
- step 44 the stripped PIN is compared with the PIN retrieved during step 32 and during step 46 the nonpredictable code remaining after the inputted value has the PIN stripped therefrom is compared with the retrieved nonpredictable code. If matches are obtained during both steps 44 and 46 (step 48) the verification computer signifies verification. If a match is not found during either step 44 or step 46 (step 50) then the user is rejected.
- a procedure is thus provided wherein user verification may be obtained using the simple and inexpensive procedure disclosed in the parent applications while still providing a high level of security for the user PIN.
- This security is achieved since the user PIN is never available on an open line which could be tapped except in the form of a word which is a mixture of the PIN with a nonpredictable code and which is virtually impossible to decipher.
- FIG. 2 illustrates an alternative configuration in which the teachings of this invention may be utilized.
- the user device 10 is of the same type shown in FIG. 1.
- the user device is adapted to be used in proximity to the verification station rather than from a remote location over telephone lines.
- the verification station 60 includes a computer 62, a display 64, such as for example a CRT display, and an input device 66 which may, for example, be a standard computer input keyboard.
- the operation with this embodiment of the invention starts with step 30, during which the user sends a nonsecret code to the verification computer 62 by, for example, keying this code into input device 66.
- computer 60 retrieves the PIN and generates the nonpredictable code for the user (step 32) and also retrieves a challenge code for the user which is displayed on display 64 (step 70).
- the user inputs his PIN and the challenge code in an order established for the system to user device 10 using input pads 12 (step 72).
- the processor in device 10 uses the inputted challenge code and the time inputted from its clock to generate a nonpredictable code which, during step 38, is mixed with the inputted pin and the results are displayed on display 14 of device 10. From this point on, the operation for this embodiment of the invention is the same as that previously described with respect to the embodiment of FIG. 1.
- the pin in uncoded form is never transmitted in a manner such that it could be observed and is not resident in the user's device where it might, using sophisticated technology, be retrieved.
- the nonsecret code may be recorded in machine-readable form on device 10 and input device 66 might include a card reader which the card is inserted into to permit the nonsecret code to be read into computer 62.
Abstract
Description
Claims (15)
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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US07/341,932 US5023908A (en) | 1984-11-30 | 1989-04-21 | Method and apparatus for personal identification |
US07/670,705 US5168520A (en) | 1984-11-30 | 1991-03-18 | Method and apparatus for personal identification |
US07/923,085 US5367572A (en) | 1984-11-30 | 1992-07-31 | Method and apparatus for personal identification |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/676,626 US4720860A (en) | 1984-11-30 | 1984-11-30 | Method and apparatus for positively identifying an individual |
US06/802,579 US4885778A (en) | 1984-11-30 | 1985-11-27 | Method and apparatus for synchronizing generation of separate, free running, time dependent equipment |
US07/341,932 US5023908A (en) | 1984-11-30 | 1989-04-21 | Method and apparatus for personal identification |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US06/802,579 Continuation-In-Part US4885778A (en) | 1984-11-30 | 1985-11-27 | Method and apparatus for synchronizing generation of separate, free running, time dependent equipment |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US07/670,705 Continuation-In-Part US5168520A (en) | 1984-11-30 | 1991-03-18 | Method and apparatus for personal identification |
Publications (1)
Publication Number | Publication Date |
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US5023908A true US5023908A (en) | 1991-06-11 |
Family
ID=27404532
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US07/298,039 Expired - Lifetime US4998279A (en) | 1984-11-30 | 1989-01-18 | Method and apparatus for personal verification utilizing nonpredictable codes and biocharacteristics |
US07/341,932 Expired - Lifetime US5023908A (en) | 1984-11-30 | 1989-04-21 | Method and apparatus for personal identification |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US07/298,039 Expired - Lifetime US4998279A (en) | 1984-11-30 | 1989-01-18 | Method and apparatus for personal verification utilizing nonpredictable codes and biocharacteristics |
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US (2) | US4998279A (en) |
Cited By (116)
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US5168520A (en) * | 1984-11-30 | 1992-12-01 | Security Dynamics Technologies, Inc. | Method and apparatus for personal identification |
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